Examine source code of Site Navigation Enhancer

{
  "manifest_version": 2,
  "name": "Site Navigation Enhancer",
  "version": "1.3",
  "description": "Enhance website navigation with smooth scrolling, keyboard shortcuts, and a Back-to-Top button.",
  "icons": {
    "32": "icons/logo_32.png",
    "64": "icons/logo_64.png",
    "128": "icons/logo_128.png"
  },
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "style.css"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{cca2f057-6623-40de-a119-3db2040fc041}"
    }
  }
}